HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Sofia

$243+ Cheap flights from Fremont, CA to Sofia (SOF)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/26. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SOF
Mar 2 — Mar 91
Mon 3/2
Mon 3/9
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Fremont to Sofia with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Fremont to Sofia

Cheapest flights from Fremont to Sofia
Explore the most affordable flight options available from Fremont to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 31, 2026.

This Mytrip deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/299:05 pm
SFO
-
SOF
1 stop16h 05m
Multiple Airlines
Wed 5/136:20 am
SOF
-
SFO
2 stops24h 46m
Multiple Airlines
Deal found 1/28$502
This CrystalTravel deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/299:05 pm
SFO
-
SOF
1 stop16h 05m
Lufthansa
Wed 5/136:20 am
SOF
-
SFO
1 stop16h 20m
Lufthansa
Deal found 1/28$511
This KAYAK deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/294:35 pm
SFO
-
SOF
1 stop34h 50m
British Airways
Mon 5/48:10 pm
SOF
-
SFO
1 stop27h 40m
British Airways
Deal found 1/28$527
This United Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/289:05 pm
SFO
-
SOF
1 stop16h 05m
United Airlines
Wed 5/66:20 am
SOF
-
SFO
2 stops21h 16m
United Airlines
Deal found 1/28$529
This United Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2910:10 am
SFO
-
SOF
2 stops27h 00m
United Airlines
Fri 5/16:20 am
SOF
-
SFO
1 stop23h 40m
United Airlines
Deal found 1/28$533
This Air Canada deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/288:30 am
SFO
-
SOF
2 stops17h 40m
Air Canada
Thu 5/76:30 am
SOF
-
SFO
2 stops42h 52m
Air Canada
Deal found 1/28$537
This United Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/289:05 pm
SFO
-
SOF
1 stop16h 05m
United Airlines
Fri 5/16:20 am
SOF
-
SFO
2 stops22h 18m
United Airlines
Deal found 1/28$539
This Air Canada deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/27:30 pm
SFO
-
SOF
2 stops32h 05m
Air Canada
Fri 5/86:20 am
SOF
-
SFO
2 stops19h 02m
Air Canada
Deal found 1/28$541
This Kiwi.com deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/2510:40 pm
SFO
-
SOF
1 stop15h 05m
Lufthansa
Wed 4/86:20 am
SOF
-
SFO
1 stop16h 20m
Lufthansa
Deal found 1/30$545
This Kiwi.com deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/2410:40 pm
SFO
-
SOF
1 stop15h 05m
Lufthansa
Tue 4/76:10 am
SOF
-
SFO
1 stop16h 30m
Lufthansa
Deal found 1/29$546

Find flight deals from Fremont to Sofia

Keep the following information in mind while searching for Fremont to Sofia flight deals. Data was last updated January 31, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$502
(Mytrip)

One-way from

$243
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$662
Provider with most accurate pricing for San Francisco-Sofia flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Francisco-Sofia flights.
Search Deals
From Fremont to Sofia
Search Deals
One-way flight from Fremont to Sofia
Search Deals
Highest demand for flights based on searches. 30% potential increase in price ($345 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($60 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Fremont to Sofia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 31, 2026.
Use the filters below to find and compare flights from Fremont to Sofia that are best for you.

Fly from

Fremont

Fly to

Sofia

Route

Depart

Return

Price

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Tue 4/28

9:05 pm-11:10 pm

1 stop16h 05m

Sofia

Tue 5/5

6:10 am-3:22 pm

2 stops19h 12m

$529

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Wed 4/29

10:10 am-11:10 pm

2 stops27h 00m

Sofia

Fri 5/1

6:20 am-10:38 pm

2 stops26h 18m

$543

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Wed 4/29

10:10 am-11:10 pm

2 stops27h 00m

Sofia

Wed 5/6

1:50 pm-12:30 am

2 stops20h 40m

$543

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Wed 3/25

10:40 pm-10:45 pm

1 stop15h 05m

Sofia

Wed 4/8

6:20 am-12:40 pm

1 stop16h 20m

$545

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Mon 4/27

12:45 am-1:05 pm

2 stops26h 20m

Sofia

Thu 4/30

6:30 am-12:40 pm

1 stop16h 10m

$546

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Wed 4/29

9:05 pm-11:10 pm

1 stop16h 05m

Sofia

Tue 10/6

6:10 am-6:38 pm

2 stops22h 28m

$546

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Sun 5/17

9:05 pm-11:10 pm

1 stop16h 05m

Sofia

Thu 5/28

6:30 am-12:40 pm

1 stop16h 10m

$563

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Tue 4/28

10:10 am-10:50 pm

2 stops26h 40m

Sofia

Mon 5/4

2:20 pm-12:40 pm

1 stop32h 20m

$567

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Thu 4/30

9:05 pm-11:10 pm

1 stop16h 05m

Sofia

Thu 5/14

6:30 am-12:40 pm

1 stop16h 10m

$573

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Thu 4/30

9:05 pm-11:10 pm

1 stop16h 05m

Sofia

Fri 5/8

12:55 pm-7:00 pm

1 stop16h 05m

$577

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/29

Showing 1-10 of 21 results
1
2
3

Best time to book a flight from Fremont to Sofia

Have a flexible travel schedule? Discover the best time to fly to Sofia from Fremont with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Fremont to Sofia

How far ahead should I book a flight from Fremont to Sofia?

Use this chart to determine the optimal time to book a round-trip flight from Fremont to Sofia. Price data was last updated on January 30, 2026.

The price you pay for your flight from Fremont to Sofia may vary depending on when you book. For the best chance of a lower fare, look to book 47 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Fremont to Sofia?

Currently, August is the cheapest month in which you can book a flight from Fremont to Sofia (average of $439). Flying from Fremont to Sofia in June is currently the most expensive (average of $792). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Sofia

Get insights into the airlines that provide service to Sofia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sofia. Reviews last updated January 31, 2026.
Get a feel of what it's like to fly with United Airlines, Turkish Airlines, and Lufthansa from Fremont to Sofia by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,219 reviews

Crew

8.1

Overall

7.4

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
9,219 reviews
United Airlines
7.4
Good
9,219 reviews

Crew

8.1

Overall

7.4

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Turkish Airlines
7.3
Good
4,207 reviews
United Airlines
7.4
Good
9,219 reviews

Crew

8.1

Overall

7.4

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Lufthansa
6.8
Okay
7,758 reviews
United Airlines
7.4
Good
9,219 reviews

Crew

8.1

Overall

7.4

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
ITA Airways
6.7
Okay
1,140 reviews
United Airlines
7.4
Good
9,219 reviews

Crew

8.1

Overall

7.4

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
British Airways
6.7
Okay
7,706 reviews
United Airlines
7.4
Good
9,219 reviews

Crew

8.1

Overall

7.4

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from Fremont to Sofia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Sofia from Fremont?

    Sofia (SOF) is the airport you will fly into if you book a flight from Fremont to Sofia. You should not have trouble finding flights to Sofia from Fremont; the airport handles an average of 0 inbound flights from Fremont per day. You should also have plenty of airline options to choose from since 6 airlines have flights to the Sofia airport from Fremont. It is only a 4.2 mi journey from Sofia (SOF) to Sofia’s city center.

  • How long is the flight from Fremont to Sofia?

    Airlines like United Airlines and Lufthansa fly from Fremont to Sofia in about 15h 05m. The time it takes to get you to your destination can typically vary by up to 1h. The distance from Fremont to Sofia is about 6481 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Fremont to Sofia one-way?

    One-way options have recently been found by users for as low as $262 on KLM. Other airlines that offer cheap prices include Lufthansa from $339 and United Airlines from $464 one-way.

  • Can I find deals for flights from Fremont to Sofia that include hotel bookings?

    Yes. In addition to deals on Fremont to Sofia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Fremont to Sofia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Fremont to Sofia.

  • Can I find deals for business class flights from Fremont to Sofia?

    Yes. Cheapflights offers flight deals from Fremont to Sofia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Fremont to Sofia?

    Currently, August is the cheapest month in which you can book a flight from Fremont to Sofia (average of $439). Flying from Fremont to Sofia in June is currently the most expensive (average of $792). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 6 airlines flying from Fremont to Sofia

Discover the top 6 airlines that operate flights from Fremont to Sofia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 31, 2026.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$542Average$689FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$563Average$862FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$594Average$770FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$614Average$920FlexibilityNo cancel feeOn-time69%
ITA AirwaysCheapest$651Average$1,084FlexibilityNo cancel feeOn-time81%
Air CanadaCheapest$771Average$1,133FlexibilityNo cancel feeOn-time67%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.